Chuck for holding glass articles.



F. E. HILL;

CHUCK FOB, HOLDING GLASS ARTICLES.

w APPLICATION FILED APR.9,1914.

L1%%1Mm Patented Dec. 22," 1914.

substitution cnucx' non HOLDING GLASS anrfoLEs.

Specification of Letters Patent Patented Dec. 22, 1e11.

Application am April 9, 191a. Serial no; 880,724.

To all whom it ma concern: I

Be it known that I, FRANK E. HILL, a citizen of the United States,residing .at Morgantown, in the county of Monongalia and State of WestVirginia, have invented new and useful Improvements in Chucks forHolding Glass Articles, of which the following is a specification.

The present invention is directed to improvements in chucks for holdingtumblers and similar articles of glassware during grinding andpolishing.

Heretofore, it has been customary to equip glass-polishing, rinding,andlike machines with a series of chucks of different sizes. Thesemachines, as will be understood, are somewhat expensive to construct,and since each chuck can be used only with one particular size oftumbler or other article, the cost of installation and maintenance of acomplete machine is very considerable. Moreover, the necessity forremoving. a chuck bodily from a machine, and the substitution thereforof another of different size, in order to permit the machine to operateupon a different size of article, is itself objectionable, owing to theloss of time occasioned thereby.

It is the purpose of this invention to remedy the aforementioned andother defects, by providing a chuck which can be used equally well withall of the different sizes of a given article and in which the changemay be made without requiring that the chuck itself be detached. On thecontrary, the onl step necessary is the mere one element of the chuckfor another, an operation which consumes but very little time and whichmay be carried out with perfect safety to the operative while themachine is running.

An embodiment of the invention is illustrated in the accompanyingdrawing, whereof Figure 1 is a fragmental side elevation the improvedchuck; Figs. 2 and 3 are enlarged vertical sections taken axiallythrough the chuck at right-angles to each other; Fig. 4 is a transversesection on line 4-4, F ig. 2; and Fig. 5 is a perspective view of theremovable element of the chuck.

ing, '7 indicates the head-block of the machine wherein the horizontalshaft 8 that carries the grinding-wheel 9 is mounted, 10

of a glass-grinding machine equipped with" Referring more particularlyto said drawthe sliding tailblock, and 11 the track along which'thelatter travels. These parts are supported upon a frame 12, and they are,in

the main, of conventional type, for which reason an extended descriptionthereof is omitted, it beingconsidered suflicient for present purposes.to state that the tail-block is'moved, through the agency of suitabledevic es, (not shown), toward and from the grinding-wheel 9, whichlatter is rotated,

from a pulley 13 on shaft 8 connected by a belt 14; or in any otherdesired manner, with a source of power.

The improved chuck, which embodies the most important features of thisinvention, as previously stated, is shown as carried by the tail-block,so as to move therewith into and out ofoperative position with relationto the grinding-wheel. As it is designed, in the constructionillustrated, to hold a tumbler, or similar cylindrical, or approximatelycylindrical, article 16, its body 15 has, likewise, the form of a hollowcylinder or sleeve which is open at its front and closed at its rearend, the latter end being provided with a threaded, axial bore 17 forthe reception of a threaded bolt 18 secured to the tail-block, as depcted in Figs. 2 and 3.

The interior of the chuck body receives the tumbler, as will beunderstood, and, for this reason, is made sufficiently large to admittumblers of widely varying diameters. In consequence, it becomesnecessary to utilize with the chuck body some means whereby all of thediiferent sizes of tumblers ma be. held in place therein with equalfacility, such means being readily insertible in and removable from thechuck body and capable of manufacture at a low cost in the several stocksizes. The means in question preferably consists of a sleeve orring-like member 19, best shown in Fig. 5 which is designed forinsertion in the front or outer end of the chuck body, and is centeredby engaging a circumferential shoulder 20 formed in the inner wallthereof. This ring or sleeve is provided upon its inner wall, in' turn,with a lining or pad 21 of rubber or other suitable material capable ofexerting a friction grip upon the surface of the inserted tumbler, asdepicted in Figs. '2, 3 and 4, and in the present instance such liningconsists of an annular band or strip that is fitted in a circumferentialgroove 22. The ring or sleeve, which thus acts as the holder proper, isso mounted within the engagement therein.

chuck body 15 that, while capable of removal therefrom, it must yet benormally locked in place therein. To this end, one of these twocompanion parts, in the present instance the ring or sleeve itself, hasformed in its outer surface a bayonet slot 23, while the other part, i.e.,-the chuck body, has a lateral pin 2-1 secured to its inner Wall forOne branch of slot 23 opens through the rear edge of the ring or sleeve,while the other'branch, (which is, of

course disposed at an angle to the firstnamed or inlet branch), is ofgradually-decreasing depth from its inner to its outer end, so that whenthe pin has entered the aforesaid inlet branch and has reached thejunction of that branch with the offset branch, rotation of the ring orsleeve in a clockwise direction, (Fig. 4:), willcause the inner end ofthe pin to exert a binding pressure against the bottom wall of theoffset branch which gradually increases as the. turning movement of thering or sleeve continues. In practice, however, a very slight turningmovement only is necessary for the purpose stated, thus permitting rapidlocking and unlocking of the ring or sleeve and, consequently, thesubstitution of one sleeve or ring for another.

While illustration of the invention has been confined to its applicationto a tumblerholding chuck, it is to be understood that in its actualworking, no such restriction is contemplated. On the contrary, it ,maybe here stated that the chucks may be so constructed as to accommodateother types or styles of glass articles, as will, in fact, be apparent,and in each instance a plurality of rings or sleeves 19 of differentthicknesses will be provided, in practice, for each chuck, to permit itsuse with different sizes of the particular article for which that chuckis designed.

In changing a chuck, all that is necessary is to unscrew it from thethreaded bolt, and then to screw the new chuck thereon, a proceedingwhich may obviously be carried out very rapidly; but it is to beunderstood that this change is only made when an article of glassware ofdifferent type from that preceding it, is to be ground, polished orotherwise treated, and that a chuck is to all intents affixed to thetail-block during the time that any given style or type of article isundergoing treatment.

I claim: l. A chuck for holding glass articles comprising a hollow bodyportion; and an annular member adapted to encircle the article and tofrictionally engage the same, removably fitted in the outer end of saidbody, said body and member constituting companion parts, one of which isprovided with a bayonet slot and the other with a lateral pin removablyengaged therein.

2. A chuck for holding glass articles comprising a hollow, cylindricalbody portion; a ring removably fitted in the outer end thereof andadapted to frictionally engage the article, said ring being formed uponits outer surface with a bayonet slot, one branch of which opens throughthe rear edge of the said surface; and a lateral pin secured to theinner wall of said body for removable engagement in said slot.

3. A chuck for holding glass articles comprising a hollow body portion;an annular member removably fitted in the outer end of said body andadapted to encircle the article, said member being provided upon itsinner surface with a circumferential groove; and a pad fitted in saidgroove and adapted to frictionally engage said article.

4:. A chuck for holding glass articles comprising a hollow body portionwhich is open at its front end and closed at its rear end, the latterend being provided with a threaded, axial bore, and an annular memberremovably fitted in the first-named end of said body and adapted tofrictionally engage the article; in combination with a threaded bolthaving one end fitted in sald bore, and a tail-block to which said boltis secured.

5. A chuck for holding glass articles comprising a hollow body portionwhich is open at its front end and closed at its rear end, the latterend being provided with a threaded, axial bore, and an annular memberremovably fitted in the first-named end of said body and adapted tofrictionally engage the article.

6. A chuck for holding glass articles comprising a hollow body portionwhich is open at its front end and closed at its rear end and is formedupon its interior with a circumferential shoulder, the second-named endof said body being provided with a threaded, axial bore, and an annularmember removably fitted in the first-named end of said body with itsinner edge in contact with said shoulder, said member being adapted tofrictionally engage the article.

IIGSSES- FRANK E. HILL.

Witnesses:

AUoUsT STENGER, ANTON RoMISCH.

